/
ingress.go
673 lines (605 loc) · 19.2 KB
/
ingress.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ingress
import (
"context"
"fmt"
"strings"
"sync"
"time"
"go.uber.org/zap"
corev1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
networkingv1 "k8s.io/api/networking/v1"
networkingv1beta1 "k8s.io/api/networking/v1beta1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"github.com/apache/apisix-ingress-controller/pkg/kube"
"github.com/apache/apisix-ingress-controller/pkg/log"
"github.com/apache/apisix-ingress-controller/pkg/providers/translation"
"github.com/apache/apisix-ingress-controller/pkg/providers/utils"
"github.com/apache/apisix-ingress-controller/pkg/types"
v1 "github.com/apache/apisix-ingress-controller/pkg/types/apisix/v1"
)
const (
_ingressKey = "kubernetes.io/ingress.class"
)
type ingressController struct {
*ingressCommon
workqueue workqueue.RateLimitingInterface
workers int
ingressLister kube.IngressLister
ingressInformer cache.SharedIndexInformer
secretInformer cache.SharedIndexInformer
endpointInformer cache.SharedIndexInformer
serviceInformer cache.SharedIndexInformer
// secretSSLMap stores reference from K8s secret to Ingress
// type: Map<SecretKey, Map<IngressVersionKey, SSL in APISIX>>
// SecretKey -> IngressVersionKey -> []string
// Secret key is kube-style meta key: `namespace/name`
// Ingress Version Key is: `namespace/name_groupVersion`
secretSSLMap *sync.Map
}
func newIngressController(common *ingressCommon, ingressLister kube.IngressLister, ingressInformer, secretInformer, endpointInformer, serviceInformer cache.SharedIndexInformer) *ingressController {
c := &ingressController{
ingressCommon: common,
workqueue: workqueue.NewNamedRateLimitingQueue(workqueue.NewItemFastSlowRateLimiter(1*time.Second, 60*time.Second, 5), "ingress"),
workers: 1,
ingressLister: ingressLister,
ingressInformer: ingressInformer,
secretInformer: secretInformer,
endpointInformer: endpointInformer,
serviceInformer: serviceInformer,
secretSSLMap: new(sync.Map),
}
c.ingressInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: c.onAdd,
UpdateFunc: c.onUpdate,
DeleteFunc: c.OnDelete,
})
return c
}
func (c *ingressController) run(ctx context.Context) {
log.Info("ingress controller started")
defer log.Infof("ingress controller exited")
defer c.workqueue.ShutDown()
if !cache.WaitForCacheSync(ctx.Done(),
c.ingressInformer.HasSynced,
c.secretInformer.HasSynced,
c.serviceInformer.HasSynced,
c.endpointInformer.HasSynced) {
log.Errorf("cache sync failed")
return
}
for i := 0; i < c.workers; i++ {
go c.runWorker(ctx)
}
<-ctx.Done()
}
func (c *ingressController) runWorker(ctx context.Context) {
for {
obj, quit := c.workqueue.Get()
if quit {
return
}
err := c.sync(ctx, obj.(*types.Event))
c.workqueue.Done(obj)
c.handleSyncErr(obj, err)
}
}
func (c *ingressController) sync(ctx context.Context, ev *types.Event) error {
ingEv := ev.Object.(kube.IngressEvent)
namespace, name, err := cache.SplitMetaNamespaceKey(ingEv.Key)
if err != nil {
log.Errorf("found ingress resource with invalid meta namespace key %s: %s", ingEv.Key, err)
return err
}
var ing kube.Ingress
switch ingEv.GroupVersion {
case kube.IngressV1:
ing, err = c.ingressLister.V1(namespace, name)
case kube.IngressV1beta1:
ing, err = c.ingressLister.V1beta1(namespace, name)
case kube.IngressExtensionsV1beta1:
ing, err = c.ingressLister.ExtensionsV1beta1(namespace, name)
default:
err = fmt.Errorf("unsupported group version %s, one of (%s/%s/%s) is expected", ingEv.GroupVersion,
kube.IngressV1, kube.IngressV1beta1, kube.IngressExtensionsV1beta1)
}
if err != nil {
if !k8serrors.IsNotFound(err) {
log.Errorf("failed to get ingress %s (group version: %s): %s", ingEv.Key, ingEv.GroupVersion, err)
return err
}
if ev.Type != types.EventDelete {
log.Warnf("ingress %s (group version: %s) was deleted before it can be delivered", ingEv.Key, ingEv.GroupVersion)
// Don't need to retry.
return nil
}
}
if ev.Type == types.EventDelete {
if ing != nil {
// We still find the resource while we are processing the DELETE event,
// that means object with same namespace and name was created, discarding
// this stale DELETE event.
log.Warnf("discard the stale ingress delete event since the %s exists", ingEv.Key)
return nil
}
ing = ev.Tombstone.(kube.Ingress)
}
tctx, err := c.translator.TranslateIngress(ing)
if err != nil {
log.Errorw("failed to translate ingress",
zap.Error(err),
zap.Any("ingress", ing),
)
return err
}
for _, ssl := range tctx.SSL {
ns, ok1 := ssl.Labels[translation.MetaSecretNamespace]
sec, ok2 := ssl.Labels[translation.MetaSecretName]
if ok1 && ok2 {
// We don't support annotation in Ingress
// _caAnnotation = "nginx.ingress.kubernetes.io/auth-tls-secret"
c.storeSecretReference(ns+"/"+sec, ingEv.Key, ev.Type, ssl)
}
}
log.Debugw("translated ingress resource to a couple of routes, upstreams and pluginConfigs",
zap.Any("ingress", ing),
zap.Any("routes", tctx.Routes),
zap.Any("upstreams", tctx.Upstreams),
zap.Any("ssl", tctx.SSL),
zap.Any("pluginConfigs", tctx.PluginConfigs),
)
m := &utils.Manifest{
SSLs: tctx.SSL,
Routes: tctx.Routes,
Upstreams: tctx.Upstreams,
PluginConfigs: tctx.PluginConfigs,
}
var (
added *utils.Manifest
updated *utils.Manifest
deleted *utils.Manifest
)
if ev.Type == types.EventDelete {
deleted = m
} else if ev.Type == types.EventAdd {
added = m
} else {
oldCtx, err := c.translator.TranslateOldIngress(ingEv.OldObject)
if err != nil {
log.Errorw("failed to translate ingress",
zap.String("event", "update"),
zap.Error(err),
zap.Any("ingress", ingEv.OldObject),
)
return err
}
om := &utils.Manifest{
Routes: oldCtx.Routes,
Upstreams: oldCtx.Upstreams,
SSLs: oldCtx.SSL,
PluginConfigs: oldCtx.PluginConfigs,
}
added, updated, deleted = m.Diff(om)
}
if err := c.SyncManifests(ctx, added, updated, deleted); err != nil {
log.Errorw("failed to sync ingress artifacts",
zap.Error(err),
)
return err
}
return nil
}
func (c *ingressController) handleSyncErr(obj interface{}, err error) {
ev := obj.(*types.Event)
event := ev.Object.(kube.IngressEvent)
if k8serrors.IsNotFound(err) && ev.Type != types.EventDelete {
log.Infow("sync ingress but not found, ignore",
zap.String("event_type", ev.Type.String()),
zap.String("ingress", event.Key),
)
c.workqueue.Forget(event)
return
}
namespace, name, errLocal := cache.SplitMetaNamespaceKey(event.Key)
if errLocal != nil {
log.Errorw("invalid resource key",
zap.Error(errLocal),
)
return
}
var ing kube.Ingress
switch event.GroupVersion {
case kube.IngressV1:
ing, errLocal = c.ingressLister.V1(namespace, name)
case kube.IngressV1beta1:
ing, errLocal = c.ingressLister.V1beta1(namespace, name)
case kube.IngressExtensionsV1beta1:
ing, errLocal = c.ingressLister.ExtensionsV1beta1(namespace, name)
}
if err == nil {
// add status
if ev.Type != types.EventDelete {
if errLocal == nil {
switch ing.GroupVersion() {
case kube.IngressV1:
c.recordStatus(ing.V1(), utils.ResourceSynced, nil, metav1.ConditionTrue, ing.V1().GetGeneration())
case kube.IngressV1beta1:
c.recordStatus(ing.V1beta1(), utils.ResourceSynced, nil, metav1.ConditionTrue, ing.V1beta1().GetGeneration())
case kube.IngressExtensionsV1beta1:
c.recordStatus(ing.ExtensionsV1beta1(), utils.ResourceSynced, nil, metav1.ConditionTrue, ing.ExtensionsV1beta1().GetGeneration())
}
} else {
log.Errorw("failed to list ingress resource",
zap.Error(errLocal),
)
}
}
c.workqueue.Forget(obj)
c.MetricsCollector.IncrSyncOperation("ingress", "success")
return
}
log.Warnw("sync ingress failed, will retry",
zap.Any("object", obj),
zap.Error(err),
)
if errLocal == nil {
switch ing.GroupVersion() {
case kube.IngressV1:
c.recordStatus(ing.V1(), utils.ResourceSyncAborted, err, metav1.ConditionTrue, ing.V1().GetGeneration())
case kube.IngressV1beta1:
c.recordStatus(ing.V1beta1(), utils.ResourceSyncAborted, err, metav1.ConditionTrue, ing.V1beta1().GetGeneration())
case kube.IngressExtensionsV1beta1:
c.recordStatus(ing.ExtensionsV1beta1(), utils.ResourceSyncAborted, err, metav1.ConditionTrue, ing.ExtensionsV1beta1().GetGeneration())
}
} else {
log.Errorw("failed to list ingress resource",
zap.Error(errLocal),
)
}
c.workqueue.AddRateLimited(obj)
c.MetricsCollector.IncrSyncOperation("ingress", "failure")
}
func (c *ingressController) onAdd(obj interface{}) {
key, err := cache.MetaNamespaceKeyFunc(obj)
if err != nil {
log.Errorf("found ingress resource with bad meta namespace key: %s", err)
return
}
if !c.namespaceProvider.IsWatchingNamespace(key) {
return
}
ing := kube.MustNewIngress(obj)
valid := c.isIngressEffective(ing)
if valid {
log.Debugw("ingress add event arrived",
zap.Any("object", obj),
)
} else {
log.Debugw("ignore noneffective ingress add event",
zap.Any("object", obj),
)
return
}
c.workqueue.Add(&types.Event{
Type: types.EventAdd,
Object: kube.IngressEvent{
Key: key,
GroupVersion: ing.GroupVersion(),
},
})
c.MetricsCollector.IncrEvents("ingress", "add")
}
func (c *ingressController) onUpdate(oldObj, newObj interface{}) {
prev := kube.MustNewIngress(oldObj)
curr := kube.MustNewIngress(newObj)
if prev.ResourceVersion() >= curr.ResourceVersion() {
return
}
key, err := cache.MetaNamespaceKeyFunc(newObj)
if err != nil {
log.Errorf("found ingress resource with bad meta namespace key: %s", err)
return
}
if !c.namespaceProvider.IsWatchingNamespace(key) {
return
}
valid := c.isIngressEffective(curr)
if valid {
log.Debugw("ingress update event arrived",
zap.Any("new object", newObj),
zap.Any("old object", oldObj),
)
} else {
log.Debugw("ignore noneffective ingress update event",
zap.Any("new object", oldObj),
zap.Any("old object", newObj),
)
return
}
c.workqueue.Add(&types.Event{
Type: types.EventUpdate,
Object: kube.IngressEvent{
Key: key,
GroupVersion: curr.GroupVersion(),
OldObject: prev,
},
})
c.MetricsCollector.IncrEvents("ingress", "update")
}
func (c *ingressController) OnDelete(obj interface{}) {
ing, err := kube.NewIngress(obj)
if err != nil {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
return
}
ing = kube.MustNewIngress(tombstone)
}
key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
log.Errorf("found ingress resource with bad meta namespace key: %s", err)
return
}
if !c.namespaceProvider.IsWatchingNamespace(key) {
return
}
valid := c.isIngressEffective(ing)
if valid {
log.Debugw("ingress delete event arrived",
zap.Any("final state", ing),
)
} else {
log.Debugw("ignore noneffective ingress delete event",
zap.Any("object", ing),
)
return
}
c.workqueue.Add(&types.Event{
Type: types.EventDelete,
Object: kube.IngressEvent{
Key: key,
GroupVersion: ing.GroupVersion(),
},
Tombstone: ing,
})
c.MetricsCollector.IncrEvents("ingress", "delete")
}
func (c *ingressController) isIngressEffective(ing kube.Ingress) bool {
var (
ic *string
ica string
)
if ing.GroupVersion() == kube.IngressV1 {
ic = ing.V1().Spec.IngressClassName
ica = ing.V1().GetAnnotations()[_ingressKey]
} else if ing.GroupVersion() == kube.IngressV1beta1 {
ic = ing.V1beta1().Spec.IngressClassName
ica = ing.V1beta1().GetAnnotations()[_ingressKey]
} else {
ic = ing.ExtensionsV1beta1().Spec.IngressClassName
ica = ing.ExtensionsV1beta1().GetAnnotations()[_ingressKey]
}
// kubernetes.io/ingress.class takes the precedence.
if ica != "" {
return ica == c.Kubernetes.IngressClass
}
if ic != nil {
return *ic == c.Kubernetes.IngressClass
}
return false
}
func (c *ingressController) ResourceSync() {
objs := c.ingressInformer.GetIndexer().List()
for _, obj := range objs {
key, err := cache.MetaNamespaceKeyFunc(obj)
if err != nil {
log.Errorw("found Ingress resource with bad meta namespace key", zap.String("error", err.Error()))
continue
}
if !c.namespaceProvider.IsWatchingNamespace(key) {
continue
}
ing := kube.MustNewIngress(obj)
if !c.isIngressEffective(ing) {
return
}
log.Debugw("ingress add event arrived",
zap.Any("object", obj),
)
c.workqueue.Add(&types.Event{
Type: types.EventAdd,
Object: kube.IngressEvent{
Key: key,
GroupVersion: ing.GroupVersion(),
},
})
}
}
// recordStatus record resources status
func (c *ingressController) recordStatus(at runtime.Object, reason string, err error, status metav1.ConditionStatus, generation int64) {
client := c.KubeClient.Client
at = at.DeepCopyObject()
switch v := at.(type) {
case *networkingv1.Ingress:
// set to status
lbips, err := c.ingressLBStatusIPs()
if err != nil {
log.Errorw("failed to get APISIX gateway external IPs",
zap.Error(err),
)
}
v.ObjectMeta.Generation = generation
v.Status.LoadBalancer.Ingress = lbips
if _, errRecord := client.NetworkingV1().Ingresses(v.Namespace).UpdateStatus(context.TODO(), v, metav1.UpdateOptions{}); errRecord != nil {
log.Errorw("failed to record status change for IngressV1",
zap.Error(errRecord),
zap.String("name", v.Name),
zap.String("namespace", v.Namespace),
)
}
case *networkingv1beta1.Ingress:
// set to status
lbips, err := c.ingressLBStatusIPs()
if err != nil {
log.Errorw("failed to get APISIX gateway external IPs",
zap.Error(err),
)
}
v.ObjectMeta.Generation = generation
v.Status.LoadBalancer.Ingress = lbips
if _, errRecord := client.NetworkingV1beta1().Ingresses(v.Namespace).UpdateStatus(context.TODO(), v, metav1.UpdateOptions{}); errRecord != nil {
log.Errorw("failed to record status change for IngressV1",
zap.Error(errRecord),
zap.String("name", v.Name),
zap.String("namespace", v.Namespace),
)
}
case *extensionsv1beta1.Ingress:
// set to status
lbips, err := c.ingressLBStatusIPs()
if err != nil {
log.Errorw("failed to get APISIX gateway external IPs",
zap.Error(err),
)
}
v.ObjectMeta.Generation = generation
v.Status.LoadBalancer.Ingress = lbips
if _, errRecord := client.ExtensionsV1beta1().Ingresses(v.Namespace).UpdateStatus(context.TODO(), v, metav1.UpdateOptions{}); errRecord != nil {
log.Errorw("failed to record status change for IngressV1",
zap.Error(errRecord),
zap.String("name", v.Name),
zap.String("namespace", v.Namespace),
)
}
default:
// This should not be executed
log.Errorf("unsupported resource record: %s", v)
}
}
// ingressLBStatusIPs organizes the available addresses
func (c *ingressController) ingressLBStatusIPs() ([]corev1.LoadBalancerIngress, error) {
return utils.IngressLBStatusIPs(c.IngressPublishService, c.IngressStatusAddress, c.KubeClient.Client)
}
func (c *ingressController) storeSecretReference(secretKey string, ingressKey string, evType types.EventType, ssl *v1.Ssl) {
if ssls, ok := c.secretSSLMap.Load(secretKey); ok {
sslMap := ssls.(*sync.Map)
switch evType {
case types.EventDelete:
sslMap.Delete(ingressKey)
c.secretSSLMap.Store(secretKey, sslMap)
default:
sslMap.Store(ingressKey, ssl)
c.secretSSLMap.Store(secretKey, sslMap)
}
} else if evType != types.EventDelete {
sslMap := new(sync.Map)
sslMap.Store(ingressKey, ssl)
c.secretSSLMap.Store(secretKey, sslMap)
}
}
func (c *ingressController) SyncSecretChange(ctx context.Context, ev *types.Event, secret *corev1.Secret, secretKey string) {
ssls, ok := c.secretSSLMap.Load(secretKey)
if !ok {
return
}
sslMap, ok := ssls.(*sync.Map) // ingress version key -> SSL
if !ok {
return
}
sslMap.Range(func(k, v interface{}) bool {
ingressVersionKey := k.(string)
ssl := v.(*v1.Ssl)
return c.syncSSLs(ctx, ev.Type, secret, secretKey, ingressVersionKey, ssl)
})
}
func (c *ingressController) syncSSLs(ctx context.Context, evType types.EventType, secret *corev1.Secret, secretKey, ingressVersionKey string, ssl *v1.Ssl) bool {
vals := strings.Split(ingressVersionKey, "_")
if len(vals) != 2 {
log.Errorw("cache recorded invalid ingress version key",
zap.String("key", ingressVersionKey),
)
}
ingressKey := vals[0]
ingressVersion := vals[1]
ingressNamespace, ingressName, err := cache.SplitMetaNamespaceKey(ingressKey)
if err != nil {
log.Errorf("invalid cached ApisixTls key: %s", ingressKey)
return true
}
var (
obj metav1.Object
ing kube.Ingress
)
switch ingressVersion {
case kube.IngressV1:
ing, err = c.ingressLister.V1(ingressNamespace, ingressName)
obj = ing.V1()
case kube.IngressV1beta1:
ing, err = c.ingressLister.V1(ingressNamespace, ingressName)
obj = ing.V1beta1()
case kube.IngressExtensionsV1beta1:
ing, err = c.ingressLister.V1(ingressNamespace, ingressName)
obj = ing.ExtensionsV1beta1()
}
if err != nil {
log.Warnw("secret related ingress resource not found, skip",
zap.String("ingress", ingressKey),
)
return true
}
cert, pkey, err := translation.ExtractKeyPair(secret, true)
if err != nil {
log.Errorw("secret required by Ingress invalid",
zap.String("ingress", ingressKey),
zap.String("secret", secretKey),
zap.Error(err),
)
go func(obj metav1.Object) {
runtimeObj := obj.(runtime.Object)
c.RecordEventS(runtimeObj, corev1.EventTypeWarning, utils.ResourceSyncAborted,
fmt.Sprintf("sync from secret %s changes failed, error: %s", secretKey, err.Error()))
c.recordStatus(runtimeObj, utils.ResourceSyncAborted, err, metav1.ConditionFalse, obj.GetGeneration())
}(obj)
return true
}
// update ssl
ssl.Cert = string(cert)
ssl.Key = string(pkey)
go func(ssl *v1.Ssl, obj metav1.Object) {
runtimeObj := obj.(runtime.Object)
err := c.SyncSSL(ctx, ssl, evType)
if err != nil {
log.Errorw("failed to sync ssl to APISIX",
zap.Error(err),
zap.Any("ssl", ssl),
zap.Any("secret", secret),
)
c.RecordEventS(runtimeObj, corev1.EventTypeWarning, utils.ResourceSyncAborted,
fmt.Sprintf("sync from secret %s changes failed, error: %s", secretKey, err.Error()))
c.recordStatus(runtimeObj, utils.ResourceSyncAborted, err, metav1.ConditionFalse, obj.GetGeneration())
} else {
c.RecordEventS(runtimeObj, corev1.EventTypeNormal, utils.ResourceSynced,
fmt.Sprintf("sync from secret %s changes", secretKey))
c.recordStatus(runtimeObj, utils.ResourceSynced, nil, metav1.ConditionTrue, obj.GetGeneration())
}
}(ssl, obj)
return true
}